When a killer shark unleashes chaos on a beach community off Cape Cod, it's up to a local sheriff, a marine biologist, and an old seafarer to hunt the beast down.
A successful psychotherapist loses his mind after one of his most dependent patients, an obsessive-compulsive neurotic, tracks him down during his family vacation.
Roy Neary, an Indiana electric lineman, finds his quiet and ordinary daily life turned upside down after a close encounter with a UFO, spurring him to an obsessed cross-country quest for answers as a momentous event approaches.